Frederick "Fritz" Siebel (December 19, 1913 – December 27, 1991) was an Austrian American illustrator, well known for his award winning World War II poster "Someone Talked"[1][2] and his illustrations for the children's book Amelia Bedelia by Peggy Parish.

In 1936 Siebel immigrated to the United States and was joined by his family in 1937, and they settled in New York City.

[6] In NYC, after his immigration, Siebel made a living illustrating posters and other advertising material for the Paramount Pictures movie studio.

The result was the now world-wide familiar smiling bald man with an earring in his left ear, dubbed "Master Proper" in German-speaking countries, "Mastro Lindo" in Italy, "Monsieur Propre" in France, "Don Limpio" in Spain and "Pan Proper" in Poland.

As part of the deal, he gave up all rights to this creation and thus was not credited for it, the copyright attributed solely to Procter & Gamble.